code: def axis(self) -> int:
      return self._axis
  
imports: import itertools
  import numpy
  import pandas
  from ...None import opcodes
  from ...core import OutputType, recursive_tile
  from ...config import options
  from ...serialization.serializables import AnyField, BoolField, StringField, Int32Field
  from ...utils import no_default, pd_release_version
  from ..align import align_dataframe_series
  from ..operands import DataFrameOperand, DataFrameOperandMixin
  from ..utils import parse_index, validate_axis
label_desc: Use image node_id 2 for calling the DataFrameDropNA obj's underlying member method code with example usage: obj.axis() and returns: self